<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <link rel="stylesheet" href="../css/position-demo.css" />
    <title>Document</title>
  </head>
  <body>
    <div class="outer">
      <div class="box box1">1</div>
      <div class="box box2">2</div>
      <div class="box box3">3</div>
      <!-- <div class="box box4">4</div> -->
    </div>
    <!-- <div class="box5"></div> -->

    <div class="outer1">
      <div class="inner1">特殊应⽤</div>
    </div>
  </body>
</html>
